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Excretory (urinary) System

Excretory (urinary) System. Mrs. Wharton’s Science Class. Functions of the Excretory System. System of the body that collects wastes produced by cells and removes the wastes from the body. Excretion- what the removal process is called.

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Excretory (urinary) System

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  1. Excretory (urinary) System Mrs. Wharton’s Science Class

  2. Functions of the Excretory System • System of the body that collects wastes produced by cells and removes the wastes from the body. • Excretion- what the removal process is called. The structures of the excretory system that eliminate urea, water, and other wastes include the kidneys, ureters, urinary bladder, and urethra

  3. Vocabulary • Kidneys- remove urea and other waste material from blood. • Urine- a watery fluid that contain urea and other wastes • Urea- a chemical that comes from the breakdown of proteins • Ureters- narrow tubes where urine flows from the kidneys • Urinary bladder- where urine is carried to ( stores urine) • Urethra- where urine flows going to the outside world

  4. Nephrons • They filter wastes. 1st- both wastes and needed material, such as glucose, are filtered out of the blood. • Then- much of the needed materials is returned to the blood, and the wastes are eliminated from the body.

  5. Homeostasis • Excretion maintains homeostasis by keeping the body’s internal environment stable and free of harmful levels of chemicals. • In addition to the kidneys, organs of excretion that maintain homeostasis include lungs, skin and liver.

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